Official NHA Assessment

Race 7: GOLD CIRCLE WISHES YOU A MERRY CHRISTMAS PINNACLE STAKES (For all Horses rated nett 116 & below)

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Line Horse
Coin Spinner
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
6 / 11
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Pray For Rain        4    60.0    1    0.00     7.0   110   109          109   -1
2    Ultra Magnus         6    56.0    2    0.30     0.0   100   115          115   +15
3    Coin Spinner         3    57.0    3    1.20     6.0   105   105          105   +0
4    African Skyline      6    56.0    4    1.95     0.0   101   115          115   +14
5    Good Traveller       6    55.5    5    2.45     0.0   103   114          114   +11
6    Stanley Park         2    52.0    6    2.85     4.0   80    99           99    +19
7    Captain's Christy    4    51.0    7    2.95     7.0   100   91           91    -9
8    Captain Bombshell    2    57.0    8    4.00     4.0   102   109          109   +7
9    Maquette             3    50.5    9    4.05     6.0   83    92           92    +9
10   Barzalona            6    54.0    10   4.10     0.0   95    111          111   +16
11   Renaissance Man      3    52.0    11   5.50     6.0   88    95           95    +7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Pray For Rain 110 106 109 -3 7.0 -
2 Ultra Magnus 100 98 115 -17 0.0 -
3 Coin Spinner Line 105 101 105 -4 6.0
4 African Skyline 101 98 115 -17 0.0 -
5 Good Traveller 103 108 114 -6 0.0 -
6 Stanley Park 80 69 99 -30 4.0 -
7 Captain's Christy 100 95 91 +4 7.0 -
8 Captain Bombshell 102 106 109 -3 4.0 -
9 Maquette 83 91 92 -1 6.0 -
10 Barzalona 95 66 111 -45 0.0 -
11 Renaissance Man 88 79 95 -16 6.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points